Method and apparatus for maintaining neutral water balance...

H - Electricity – 01 – M

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H01M 8/04 (2006.01) H01M 8/06 (2006.01)

Patent

CA 2360389

In a fuel cell system, sufficient water to supply the consumption needs of the system, particularly by the system humidifiers and fuel processor, can be obtained from the exhaust of the fuel cell stack without the use of a condenser, by controlling the operating temperature of the fuel cell stack. The operating temperature can be controlled, for example, using a controller that monitors water level in the process water reservoir and increases or decreases the operating temperature through control of the fuel cell cooling system to maintain the water level within a predetermined range representative of neutral water balance in the system.

La présente invention concerne un système d'éléments à carburant dans lequel on obtient, sans condensateur, une quantité d'eau suffisante pour satisfaire les besoins de consommation du système, en particulier ceux des humidificateurs et du processeur de quantité de carburant, à partir des émissions de la pile d'éléments à carburant, en régulant la température de fonctionnement de cette dernière. On peut, par exemple, utiliser à cet effet un régulateur qui surveille le niveau d'eau dans le réservoir d'eau de traitement, et augmente ou diminue la température de fonctionnement en commandant le système de refroidissement des éléments à carburant de façon à maintenir le niveau d'eau dans une plage prédéterminée correspondant à un bilan hydrique neutre pour le système.

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